it's unknown how they ended up in such shallow waters, though this species is known for its close-knit social groups, so if one whale gets stuck, the others are more likely to stay behind as well. it was quite a night here at roch fe rockefeller center. take a look. >> three, two, one! >> wow. yeah, the rockefeller christmas tree lit up, ushering in the holiday season as it has every years since 1933. there's mariah carey. beautiful red dress performing "all i want for christmas." of course, the rockettes. the 76-foot norway spruce is covered with no less than 45,000 l.e.d. lights. as if the lights alone weren't festive enough, the tree is also topped with a 12-ton, 9 1/2-foot wide star. how they got that thing up there. we watched the tree come in.